PROPERTY, PLANT AND EQUIPMENT (Tables)

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	September 30, 2022		December 31, 2021
Land	$	172,143	$	165,010
Asset retirement costs (non-landfill)	20,832		19,105
Landfill assets	217,277		205,873
Buildings and improvements (1)	575,429		551,795
Camp equipment	115,859		127,680
Vehicles (2)	1,066,576		912,836
Equipment (3)	2,042,972		2,092,395
Furniture and fixtures	6,458		6,444
Construction in progress	124,069		60,447
	4,341,615		4,141,585
Less - accumulated depreciation and amortization	2,417,940		2,278,410
Total property, plant and equipment, net	$	1,923,675	$	1,863,175

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(1) Balances inclusive of gross right-of-use ("ROU") assets classified as finance leases of $8.0 million and $8.9 million, respectively.

(2) Balances inclusive of gross ROU assets classified as finance leases of $88.8 million and $77.7 million, respectively.

(3) Balances inclusive of gross ROU assets classified as finance leases of $9.1 million and $9.3 million, respectively.